KR920018726A - Digital recording media - Google Patents

Digital recording media Download PDF

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Publication number
KR920018726A
KR920018726A KR1019920003511A KR920003511A KR920018726A KR 920018726 A KR920018726 A KR 920018726A KR 1019920003511 A KR1019920003511 A KR 1019920003511A KR 920003511 A KR920003511 A KR 920003511A KR 920018726 A KR920018726 A KR 920018726A
Authority
KR
South Korea
Prior art keywords
film
digital recording
recording medium
medium according
naphthalate
Prior art date
Application number
KR1019920003511A
Other languages
Korean (ko)
Other versions
KR100258451B1 (en
Inventor
시게오 우쯔미
Original Assignee
다니모또 기요시
다이아호일 훽스트 가부시끼가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 다니모또 기요시, 다이아호일 훽스트 가부시끼가이샤 filed Critical 다니모또 기요시
Publication of KR920018726A publication Critical patent/KR920018726A/en
Application granted granted Critical
Publication of KR100258451B1 publication Critical patent/KR100258451B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
    • G11B5/73935—Polyester substrates, e.g. polyethylene terephthalate characterised by roughness or surface features, e.g. by added particles
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
    • G11B5/73929—Polyester substrates, e.g. polyethylene terephthalate comprising naphthalene ring compounds, e.g. polyethylene naphthalate substrates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
    • G11B5/73931—Two or more layers, at least one layer being polyester

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Magnetic Record Carriers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Chemically Coating (AREA)
  • Physical Vapour Deposition (AREA)
  • Laminated Bodies (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

내용 없음No content

Description

디지털 기록 매체Digital recording media

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (8)

폴리에틸렌 나프탈레이트 필름을 종방향으로 연신시킨후, 횡방향으로 연신시키기 전에 윤활제 함유 코팅액으로 상기 필름을 코팅한 다음, 코팅된 필림을 횡방향으로 연신시키고, 그 필름을 종방향으로 재연신시키지 않고 열경화시킴으로써 제조되는 폴리에틸렌 나프탈레이트 필름의 비자성 지지체와 상기 필름의 매끄러운 표면에 형성된 강자성 금속의 박층을 포함하는 디지털 기록매체.After stretching the polyethylene naphthalate film in the longitudinal direction, the film is coated with a lubricant-containing coating liquid before stretching in the transverse direction, and then the coated film is stretched in the transverse direction, and the film is heated without re-stretching in the longitudinal direction. A digital recording medium comprising a nonmagnetic support of a polyethylene naphthalate film produced by curing and a thin layer of ferromagnetic metal formed on a smooth surface of the film. YMD≥800Y MD ≥800 YTD≥700Y TD ≥700 Ra≥0.008R a ≥0.008 H1≤10H 1 ≤10 상기 식에서 YMD는 필름의 종방향 영률(㎏/㎟)이고; YTD는 필름의 횡방향 영률(㎏/㎟)이며; Ra는 필름의 매끄러운 표면에 대한 중심성 평균 조도(㎛)이고, H1은 중복 간섭(multiple interference)법에 의해 측정된 필름의 매끄러운 표면상에 0.27㎛이상의 높이를 갖는 돌기의 수(수/100㎠)이다.Wherein Y MD is the longitudinal Young's modulus (kg / mm 2) of the film; Y TD is the transverse Young's modulus (kg / mm 2) of the film; R a is the central mean roughness (μm) of the smooth surface of the film, and H 1 is the number of protrusions (number / 100) having a height of 0.27 μm or more on the smooth surface of the film measured by the multiple interference method. Cm 2 ). 제 1항에 있어서, 폴리에티렌 나프탈레이트가 고유점도 0.40이상을 갖는 디지털 기록 매체.The digital recording medium according to claim 1, wherein the polystyrene naphthalate has an intrinsic viscosity of at least 0.40. 제 1항에 있어서, 폴리에티렌 나프탈레이트가 불활성 미립자를 함유하는 디지털 기록 매체.The digital recording medium according to claim 1, wherein the polystyrene naphthalate contains inert fine particles. 제 1항에 있어서, 폴리에티렌 나프탈레이트가 등가 환산 구형직경으로 평균입경 0.01 내지 10㎛를 갖는 디지털 기록 매체.2. The digital recording medium according to claim 1, wherein the polystyrene naphthalate has an average equivalent diameter of 0.01 to 10 mu m in equivalent equivalent spherical diameter. 제 3항에 있어서, 불황성 입자의 양이 폴리에티렌 나프탈레이트의 0.01 내지 1중량%인 디지털 기록 매체.4. The digital recording medium according to claim 3, wherein the amount of the vulcanizable particles is 0.01 to 1% by weight of polystyrene naphthalate. 제 1항에 있어서, 중심선 평균 조도가 0.006㎛이하인 디지털 기록 매체.The digital recording medium according to claim 1, wherein the center line average roughness is 0.006 mu m or less. 제 1항에 있어서, YMD및 YTD가 800㎏/㎟인 디지털 기록 매체.The digital recording medium according to claim 1, wherein Y MD and Y TD are 800 kg / mm 2. 제 1항에 있어서, YMD가 1000㎏/㎟이상이고 YTD가 800㎏/㎟인 디지털 기록 매체.The digital recording medium according to claim 1, wherein Y MD is at least 1000 kg / mm 2 and Y TD is 800 kg / mm 2. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019920003511A 1991-03-04 1992-03-03 Digital recording medium KR100258451B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3037556A JPH04276310A (en) 1991-03-04 1991-03-04 Digital recording medium
JP91-037556 1991-03-04

Publications (2)

Publication Number Publication Date
KR920018726A true KR920018726A (en) 1992-10-22
KR100258451B1 KR100258451B1 (en) 2000-06-01

Family

ID=12500792

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920003511A KR100258451B1 (en) 1991-03-04 1992-03-03 Digital recording medium

Country Status (5)

Country Link
EP (1) EP0502479A1 (en)
JP (1) JPH04276310A (en)
KR (1) KR100258451B1 (en)
CA (1) CA2061969A1 (en)
MX (1) MX9200914A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0208506D0 (en) 2002-04-12 2002-05-22 Dupont Teijin Films Us Ltd Film coating
KR100816414B1 (en) * 2006-10-31 2008-03-25 에스케이씨 주식회사 Biaxially oriented polyethylenenaphthalate film and the preparation thereof
JP5037168B2 (en) * 2007-02-23 2012-09-26 株式会社カネカ Electroless plating materials, laminates and printed wiring boards

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62113529A (en) * 1985-11-13 1987-05-25 Diafoil Co Ltd Polyethylene naphthalate film

Also Published As

Publication number Publication date
MX9200914A (en) 1992-09-30
CA2061969A1 (en) 1992-09-05
KR100258451B1 (en) 2000-06-01
EP0502479A1 (en) 1992-09-09
JPH04276310A (en) 1992-10-01

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